401670979 has 2 divisors, whose sum is σ = 401670980. Its totient is φ = 401670978.

The previous prime is 401670961. The next prime is 401670989. The reversal of 401670979 is 979076104.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401670979 - 2¹¹ = 401668931 is a prime.

It is a super-2 number, since 2×401670979² = 322679150741636882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401670989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200835489 + 200835490.

It is an arithmetic number, because the mean of its divisors is an integer number (200835490).

Almost surely, 2^401670979 is an apocalyptic number.

401670979 is a deficient number, since it is larger than the sum of its proper divisors (1).

401670979 is an equidigital number, since it uses as much as digits as its factorization.

401670979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 401670979 is about 20041.7309382199. The cubic root of 401670979 is about 737.8308642399.

The spelling of 401670979 in words is "four hundred one million, six hundred seventy thousand, nine hundred seventy-nine".